Home » Signal Conditioners & Network I/O » Temperature Transmitters » Thermocouple Input - Temperature Transmitters
Thermocouple transmitters convert Type J, K, T, E, R, S, B, or N thermocouple sensor input signals to 4-20mA or 0-10V DC outputs for interfacing to controllers or other instrumentation.

Showing the single result

  • Compare

    VPM3000 Series: Universal Transmitter / Alarm with Display

    • Big, bright display
    • 4-20mA, ±10V, thermocouple, or RTD input
    • 4-20mA, Modbus serial, or alarm relay output options
    Acromag VPM3000 Vertu™ digital panel meters are among the most versatile on the market and able to operate as a transmitter and/or alarm to satisfy a wide variety of process and temperature applications. Learn more about the VPM3000 by watching this short video.
    Select options

Thermocouple Temperature Transmitters - Continued

Green Separator Line

Points of Consideration When Using Thermocouples to Measure Temperature 

Thermocouples work by the temperature difference between one end of a conductor and the other end that produces the small electromotive force (emf), or charge imbalance, that leads us to the temperature difference across the conductor.

OK, simple enough, but how do you actually measure this emf in order to discern its relationship to temperature? 
Read Temperature Measurement Using Thermocouples Industry Technology Paper for more detailed information.

Since accuracy will ultimately play a significant role in selecting a sensor type, we should be familiar with potential sources of error when making temperature measurements with thermocouples. Some of these considerations may steer us from one T/C type to another, or perhaps to another sensor type, like RTD transmitters for example.

12 Points to Consider When Using Temperature Thermocouple Transmitters

  1. Thermocouple Sensor Inaccuracy
  2. Thermocouple Sensor Non-Linearity
  3. Thermocouple Sensor Sensitivity
  4. Sensor Drift, Aging, and De-Calibration
  5. Choice of Extension Wire
  6. Response Time
  7. Cold Junction Compensation
  8. Connection Problems
  9. Thermal Shunting and Immersion Error
  10. Lead Resistance
  11. Noise
  12. Common-Mode Voltage